The park contains the Kong Lor Cave, a 7km-long tunnel through which the Nam Hinboun River flows.
The landscape is part of one of the largest continuous limestone karst ecosystems in Southeast Asia.
The park was established in 1993 to protect the watershed of the Nam Hinboun River.
It is home to the rare Rock Rat (Laonastes aenigmamus), a species once thought extinct since the prehistoric era.
The limestone formations feature unique sinkholes and subterranean rivers that remain largely unexplored.
Phou Hin Poun National Bio-Diversity Conservation Area is a karst limestone landscape covering 1,500 square kilometers in Khammouane Province. The terrain is characterized by sheer cliffs, deep valleys, and extensive cave systems carved by the Nam Hinboun River. It serves as a sanctuary for diverse wildlife including the langur and the saola. The area features high-altitude plateaus and dense semi-evergreen forests. Visitors primarily access the park through the Kong Lor cave system, which stretches 7 kilometers through the mountain. The geology is dominated by fossil-rich limestone formations dating back millions of years.
The mouth of the Kong Lor cave at the river entrance provides the most iconic landscape perspective.
Hire a local boat guide for the river transit through Kong Lor Cave to ensure safety and navigation.
Carry a high-quality waterproof flashlight for cave exploration.
Wear insect repellent to protect against mosquitoes and ticks in the forest areas.
Do not attempt to traverse the underground cave systems without a certified local guide or proper safety equipment.
Access may be limited during the peak of the rainy season when river levels rise and render cave boat transit hazardous.
Dress modestly by covering shoulders and knees; remove footwear before entering any local religious sites or village dwellings.
